Bi 
Cie 
will return to the question if we can determine the shape of these 
projections. In these calculations we confine ourselves to the case of 
small vapour pressure. 
We may put (see p. 7): 
d hi u / 
8 == zt Ti 
l—x, -y, lr, 
Ys U. DM 
and = eg Me Hi 
Ud eee h 1—w#,- U, 
Adding these equations we get: 
1 ve “ye A 
en _ eb Ce 
—w,—Y, 1—«#,—y, 
1 Lta(e"™—1)+y,(e"% —1) 
or = = — 
1—a,—y, ee 41 
Hence also : 
x. Meas 
ae gS vay AD Mead) 
Yo é My a 
and eT 
Hs pe, TAD 
Oe, (I—e,)(e” 7 Anke —1) 
ade, (1) tye" * 1) 
that AID" 
In thesame way: 
and 
Ji 1e, (e” : Ln be (e” BE 
If we substitute in equation II these values of #,—, and of y,—y,, 
DES 075 % if 
and the values of ——, and — found on page 5 and if we 
Oz,?’ Oz dy, Oy,” 
divide by MRT then we find the following differential equations, 
where we denote for brevity’s sake by MN the nominator of the 
fractions ne the values oh Ld, and y,—y, 
NES dean a seo aa y 1_]) 7 Gd ea aun, | aa, ae 
LV p= ened 
ze (l—y, ye” a gee eae Bd EEn DEE ae rae | de, sE 
dh Wa zb 
Ed 9002) ne en | dr + 
ie aaa {i 
Baye En 
se end cae 
